Reversible drill-throttle.



R. A. NORLING.

REVERSIBLE DRILL THROTTLE.

APPLICATION FILED JULY 23, 1908. 91 0,224, Patented Jan. 19, 1909 R. A. NORLING. REVERSIBLE DRILL THROTTLE.

APPLICATION FILED JULY 23, 1908.

Patented Jan. 19, 1909.

2 SHEETS-SHEBT 2.

flew/midi 0110 UNITED STATF S ATENT FFIQE.

REINHOLD A. NORLING, OF AURORA, ILLINOIS, ASSIGNOB TO AURORA AUTOMATIC MACHINERY COMPANY, OF AURORA, ILLINOIS, A CORPORATION OF ILLINOIS.

REVERSIBLE DRILL-THROTTLE.

Specification of Letters Patent.

Patented Jan. 19. 1909.

Application filed July 23, 1908. Serial No. ,993.

To all whom it may concern:

Be it known that I, RnrNHoLD A. Non- Line, a citizen of the United States, and a resident of Aurora, in the county of Kane and State of Illinois, have invented certain new and useful Improvements in Reversible Drill-Throttles; and I do hereby declare that the following is a full, clear, and exact de scription thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

This invention relates to improvements in portable pneumatic drills or mechanism of that kind embracing a fiuid pressure motor of portable form applied to operate a drill or like tool such, for instance, as is described in United States Letters Patent No. 817,384 granted to me on the 20th day of April 1906 and more particularly to a self contained reversible throttle valve for such a drill.

The invention consists in the matters hereinafter set forth and more particularly pointed out in the appended claims. a

In the following drawings, illustrating my invention: Figure 1 is a central longitudinal section of the tool handle in which is located. the parts relating to my invention. Fig. 2 is a sectional view taken upon line 2-2 of Fig. 1 and illustrates the throttle valve and parts opening into the chambers of the drill. Fig. 3 is a section taken upon line 33 of Fig. 1. Fig. 4 is a section taken upon line & l of Fig. 1. Fig. 5 is a section ta ten upon line 55 of Fig. 1. Fig. 6 is an end view of the valve casing-relating to this invention. Fig. 7 is a section taken upon line 77 of Fig. 6. Fig. 8 is a section taken upon line 88 of Fig. 6. Fig. 9 is a section taken upon line 99 of Fig. 6. Fig. 10 is a face view of a plate or cap attached to the end of the throttle valve casing.

As shown in the said drawings, 2 indicates a fragmentary section of the main casing of the motor containing two air chamhere 3 and 4 which are separated from each other by means of a wall 5. Upon one wall of the casing 2, adjacent to the said chambers 3 and 1 is an annular flange 6 which is made integral with the said casing, the portion of the wall which is surrounded thereby being provided with a flat bearing surface 7. In one wall of the casing2 and surrounded by the said annular flange 6 are two ports 8 and 9 which open severally into the chambers 3 and 4 and afford communication between the said chambers and the reversing throttle valve, the principal operating parts of which are located within the said annular flange. Referring to the construction of the said throttle valve, 10 designates a tube which forms one of the handles of the tool and through which compressed air is supplied to the power cylinders of the motor. At its outer end the tube 10 is provided with a nipple 11 for attachment thereto of a fluid supply tube or hose. Vi ithin the flange 6 is located a valve casing 12 which is shown as made integral with the tube 10 and which fits closely within the flange 6, said valve casing being of cylindric form and having a flat inner end. Attached to this flat inner end of the said valve casing is a fiat disk or plate 13 which is secured thereto by means of screws, said disk being adapted to bear closely against the flat bearing surface 7 on the wall of the casing 2. Through the said disk 13 are openings 1 1 and 15 which register with the ports 3 and 1 of the casing 2. Surrounding the tube 10 and located near the inner end thereof is acollar 17 provided with external screw threads which engage with internal screw threads on the flange 6, said collar being adapted for contact with an outwardly facing oblique shoulder on the valve casing 12. The said collar not only acts to securely hold the inner end of the outer casing against the hearing surface uponthe drill casing wall and to rigidly secure the tubular handle 10 to the drill casing, but is adapted to be easily removed, permitting easy removal of the throttle valve as a whole.

The valve casing 12 is provided with a central longitudinally arranged valve chanr her, which is conical in shape and is tapered toward the supply end of the handle. In said valve chamber is fitted a throttle or reversing valve plug 22. Leading laterally from the interior of the said valve casing are passages 18 and 19 which afford communication between the said valve chamber and the air chambers 3 and 41, respectively, of the drill. The passages 18 and 19 open through the flat, inner end face of the casing 12, and communicate with the ports 6 and 7 in the wall of the casing 2. Opening through the side of the valve casing 12, midway between the passages 18 and 19, is a passage 20 which affords communication between the valve chamber and an exhaust port 21, which opens to the outer air through the lower outer wall of the flange 12. The said valve plug 22, which is adapted to be turned within the valve chamber, is provided with a longitudinally arranged passage 23 which opens through the outer end of the said valve plug and communicates with the tube 10. At its inner end the said passage 23 opens laterally through the side of the valve plug by an opening 24, into the valve chamber. 011 its side remote from the opening at the said valve plug is cut away to form a recess 25 of suflicient width to span the distance between the exhaust passage 20 and either of the passages 18 or 19 (Fig. 2) in the valve casing, and to form a free passage for the air therebetween.

To afford longitudinal adjustment to the valve plug 21 in the valve chamber and to insure a close fit between the side of the plug and the inner conical surface of the valve chamber, means are provided as follows: Located within the valve chamber between the inner end of the valve plug 22 and the flat disk 13 and secured to the inner end of the said plug is a flat washer 26 which is tapered slightly at its margins to conform to the taper of the valve chamber. Through a screw-threaded aperture in the center of the plate 13 is inserted an adjusting screw 29 which bears at its inner end against the washer 25 to adjust the valve plug 21 against its tapered bearing. The slotted end or head of the said adjusting screw enters a recess formed in the wall of the casing 2 to receive it. The end of the valve plug 22 which extends toward the supply end of the tube 10 is provided with two tongues 30, 30 which are adapted to fit into diametrically opposite slots in a tube or coupling section 31 which is located within the tubular handle 10. At its end remote from the valve plug 21 the said coupling section 31 is provided with two endwise extending tongues 32, 32 which fit into diametrically oppositely arranged notches in the adjacent ends of an operating plug 33 which is provided with a passage therethrough; the said operating plug and coupling together forming a pas sage for the air from the supply end of the tubular handle 10 to the valve plug 22.

For operating the valve plug 22 or giving rotative movement thereto, devices are provided as follows: Surrounding the outer end 01' the tubular handle 10, is an external sleeve 35 forming a hand grip. The said sleeve, which is rotative upon the said tube, abuts at its inner end against an outwardly facing annular shoulder on the said handle "and is held inits longitudinal position by means ofa shoulder on the nipple 11, which is in contact with the said sleeve at its outer "end. The sleeve 35 is connected with the operating plug 33 by means of a radially arranged stud 36 which passes through a transverse slot 37 in the tube 10 and has screw-threaded engagement with the said plug 33. Oil is supplied to the inner end of the valve plug 22, which has bearing within the chamber, through an angularly disposed oil hole or passage 40 which extends obliquely downward therefrom and opens through one wall of the exhaust passage 20 of the valve casing 12.

Figs. 1 and 2 show the position of the parts described when the valve plug 22 is turned in position. for the passage of air from the supply pipe to the air chamber 3 and the exhaust of the air from the air chamber 1. in this position of the parts, the port 23 of the rotative valve plug registers through the opening 24 with the passage 18 of the valve casing and the air from the interior of the tube 10 passes in this instance through the port 8 into the air chamber 3. Exhaust air from the chamber 4 in this instance passes outwardly through the port 9 through the opening 19 and thence through the port 25 in the valve plug to the exhaust passage 20 of the valve casing and outwardly through the opening 21 to the outer air. By turning the sleeve 35 through an angle of approximately 110 from the position shown in Fig. 2, the opening 24 of the passage registers with the passage 19, and the air will pass from the supply pipe through the port 23 and the passage 19 to the chamber 4 and the exhaust air from the chamber 3 will pass through the port 8 to the passage 18, from thence through the port 25 in the valve disk to the exhaust passage 20 of the valve casing and outwardly through the opening 21 to the outer air. lVith the parts in the latter described position the motor will be caused to operate in a reverse direction to that in which it operates when the parts are in the position illustrated in Figs. 1 and 2.

In addition to operating as a reversing valve, the above described structure may be made to operate as a cut-01f or throttle valve, it being manifest that when the valve plug is turned to bring it into position with the recess 24 of the port 23 registering with the portion of the wall of the valve casing which separates the passage 18 from the passage 19, the air supply will be entirely cut oft from the motor.

'A valve constructed as hereinbefore described and illustrated has several advantages, chief among them being the easy accessibility of the principal operating parts of the valve and the ease with which the parts of the device may be adjusted or resaid annular casing, the throttle valve is self contained, necessitating only the removal of the collar 17 in order to separate the entire valve from the drill casing and make all of the parts accessible for adjusting the valve plug by turning the screw 29, for removing the valve plug and substituting a new one, or for adjusting and testing the operating parts of the valve. YVith the parts once properly adjusted, the valve can be replaced upon the motor without disturbing the adjustment thereof and by merely screwing the collar 1? into place the said valve will be held or clamped in its seat on the motor casing in position for operation.

I claim as my invention 1. The combination with a motor casing provided with air chambers, with ports opening through one wall of the said easing into the said chambers, and with an integral annular flange surrounding the said ports,

of a tubular handle a valve casin 011 the J: a c inner end or said handle located within the flange, said valve casing being provided with a valve chamber, a valve plug located within the said valve chamber, a disk carried by the inner end of the valve casing and closing the inner end of the said valve chamber, and means for detachably securing the said valve casing within the integral annular flange.

2. The combination with a motor casing provided with air chambers, with ports opening through one wall of said easing into said chambers, and with an integral annular flange surrounding the said ports, of a tubular handle, a valve casing on the inner end of said handle located within the said annular flange, said casing being provided with laterally arranged air passages adapted to register with the ports in the wall of the motor casing, a throttle valve located within said casing, valve adjusting means carried upon the inner end of the said casing, valve operating means carried by the said tubular handle, and means for detachably securing the said valve casing within the integral annular flange.

8. The combination with a motor casing provided with air chambers, with ports opening through one wall of the said easing into the said chambers, with an annular flange surrounding said ports and with a bearing surface upon the portion of the casing wall surrounded by the said flange, of a tubular handle, a throttle valve casing upon the inner end of the said tubular handle, said casing being provided with a. valve chamber and with an outwardly facing annular shoulder, a valve-plug in said valve chamber, a flat disk secured to the inner end of said valve casing and closing the inner end of the valve chamber, said disk being adapted to fit closely against the bearing surface upon the casing wall, and a collar having screw -threaded engagement with the annular flange and bearing upon the said annular houlder of the valve casing.

l. The combination with a motor casing provided with two air chambers, with ports opening through one wall of said casing severally into the said chambers and on said wall with an integral, annular flange which surrounds the said ports, of a tubular handle, a throttle valve casing on the inner end of the tubular handle, located within the said annular flange, said valve casing being provided with a tapered valve chamber, a rotative conical valve plug within the said chamber, means on the inner end of the valve casing for adjusting the said valve plug longitudinally in the valve chamber, and means for detachably securin the valve casing to the mot r casing.

5. The combination with a motor casing provided with two air chambers, with ports opening through one wall of said casing severally into the said chambers, and on said wall with an integral, annular flange which surrounds the said ports, of a tubular handle, a throttle valve casing on said tubular handle, located within the said annular flange, said valve casing being provided with a valve chamber which is tapered toward the receiving end of the said tubular handle, a conical valve plug within said valve chamher, a plate secured to the inner end of the valve casing, and an adjusting scr w extending through the said plate and adapted to act endwise on the inner end of the said valve plug.

6. The combination wth a motor casing provided with two air chambers, with ports opening through one wall of said casing severally into the said air chambers, and on said wall with an integral, annular flange which surrounds the said ports, of atubular handle adapted at one end for attachment of an air supply hose, a valve easing upon the inner end of the said tubular handle located within the said annular flange, said casing being provided with a valve chamber which is tapered inwardly toward the supply end of the said tubular handle, a conical valve plug within said chamber, a washer adapted to bear against the inner end of the said valve plug, a plate attached to the inner end of the said valve casing, and an adjusting screw e3:- tending through the said plate and acting against the said washer.

7. The combination with a motor casing provided with two air chambers, with ports opening through one wall of said casing severally into the said chambers, and on said wall with an integral, annular flange which surrounds said ports, of a tubular handle adapted at one end for attachment of an air supply hose, a throttle valve casing on the inner end of the tubular handle, located within the said annular flange, said valve casing being provided with a valve chamber, Y

said ports in the wall of the casing, and with an exhaust passage opening from the said valve chamber, a rotative valve plug within said chamber adapted to deliver air from the hollow handle to either of the air chambers and to establish connection between either of said air chambers and the exhaust passage, and means on said handle connected with said valve plug for turning the same.

8. The combination with a motor casing provided with two air chambers, with ports opening through one wall of said casing severally into the said chambers, and on said wall with an integral, annular flange which surrounds said ports, of a tubular handle adapted at one end for attachment of an air supply hose, a throttle valve casing on the inner end of the tubular handle located within the said annular flange, said valve casing being provided with a valve chamber, with air passages affording communication between said valve chambers and each of the air chambers, and with an exhaust passage opening from the said valve chamber, a rotative valve plug within said chamber, provided with a supply port adapted to deliver air to either of said chambers and with an exhaust port adapted to deliver air from either of said chambers to the said exhaust passage, and means on said handle connected with said valve plug for turning the same.

9. The combination with a motor casing provided with two air chambers, with ports opening through one wall of said casing severally into said chambers, and on said wall with an integral, annular flange which surrounds said ports, of a tubular handle adapted at one end for attachment of an air supply hose, a throttle valve casing on the inner end of the tubular handle located within the annular flange, said valve casing being provided with a conical valve chamber, with two air passages leading laterally from the interior of the said valve casing and opening through the inner end of the valve casing in register with the ports in the casing Wall,

and with an exhaust passage located between the said air passages and opening from the valve chamber to the outer air, an outwardly tapered conical valve plug rotatively mounted within the said valve chamber, said valve plug being provided with a supply port adapted to register with either of the said air passages leading to the drill chambers, and with an exhaust port adapted to establish communication between either of the said ports in the wall of the drill casing and said exhaust passage, and means on the said handle connected with the said plug for rotating the same.

10. The combination with a motor casing provided with two air chambers, with ports opening through one wall of the said casing severally into the said air chambers, and on said wall with an integral, annular flange which surrounds the said ports, a tubular handle adapted at one end for attachment of an air supply hose, a throttle valve casing 011 the inner end of the tubular handle, located within the said annular flange, said valve casing being provided with a valve chamber, with air passages affording communication between said valve chamber and the air chambers and with an exhaust passage communicating with the said valve chamber, a rotative valve plug within said chamber adapted to deliver air from the hollow handle to either of the air chambers, a tubular coupling. member located within the tubular handle and connected with the valve disk, a hollow operating plug to which the outer end of the said coupling member is connected, a rotative grip surrounding the tubular handle, and a stud passing through a transverse slot in the said tubular handle, by means of which the rotative grip is connected with the operating plug.

In testimony, that I claim the foregoing as my invention I afiix my signature in the presence of two witnesses, this 16th day of July A. D. 1908.

REINHOLD A. NORLING.

lVitnesses:

AxEL LEVEDALF, W. ARMSTRONG. 

